vue element upload组件 file-list的动态绑定实现

<template>
 <div class="view">
  <div class="item" v-for="(item,index) in formList" :key="index">
   <div style="font-size: 14px; color: #606266;line-height: 40px;">相关图片资料</div>
   <el-upload
    action="https://jsonplaceholder.typicode.com/posts/"
    list-type="picture-card"
    :on-preview="handlePictureCardPreview"
    :on-remove="(file, fileList)=>{return handleRemove(file, fileList, index)}"
    :limit="5"
    :on-exceed="onExceed"
    :file-list="item.pics"
    :on-success="(response, file, fileList)=>{return onSuccess(response, file, fileList, index)}"
   >
    <i class="el-icon-plus"></i>
   </el-upload>
   <el-dialog :visible.sync="dialogVisible">
    <img width="100%" :src="dialogImageUrl" alt />
   </el-dialog>
   <el-form label-position="top" label-width="80px" :model="item">
    <el-row :gutter="20">
     <el-col :span="12">
      <el-form-item label="活动名称">
       <el-input v-model="item.name"></el-input>
      </el-form-item>
     </el-col>
     <el-col :span="12">
      <el-form-item label="活动链接">
       <el-input v-model="item.content"></el-input>
      </el-form-item>
     </el-col>
    </el-row>
   </el-form>
   <el-button type="danger" @click="delItem(index)" style="margin-bottom:20px">删除</el-button>
  </div>
  <el-button type="success" @click="addItem" style="width:1000px">添加活动</el-button>
  <el-button type="primary" @click="saveItem" style="margin-top:20px;margin-left:0;">保存活动</el-button>
 </div>
</template>
 
<script>
export default {
 name: "HelloWorld",
 data() {
  return {
   dialogImageUrl: "",
   dialogVisible: false,
   formList: [{ pics: [] }]
  };
 },
 methods: {
  // 上传图片
  onSuccess(response, file, fileList, idx) {
   // 这里是element的上传地址，对应的name,url,自己打印fileList对照
   this.formList[idx].pics.push({ name: file.name, url: file.url });
  },
  // 移除图片
  handleRemove(file, fileList, idx) {
   let Pics = this.formList[idx].pics;
   Pics.forEach((item, index) => {
    if (file.name == item.name) {
     Pics.splice(index, 1);
    }
   });
  },
  // 查看图片
  handlePictureCardPreview(file) {
   this.dialogImageUrl = file.url;
   this.dialogVisible = true;
  },
  onExceed(file, fileList) {
   this.$message({
    type: "warning",
    message: "最多上传5张"
   });
  },
  // 添加活动
  addItem() {
   this.formList.push({ pics: [] });
  },
  // 删除活动
  delItem(idx) {
   if (this.formList.length > 1) {
    this.formList.splice(idx, 1);
   } else this.formList = [{ pics: [] }];
  },
  // 保存活动
  saveItem() {
   this.$message({
    type: "success",
    message: "保存成功,可以刷新下试试回显效果"
   });
   console.log(this.formList);
   localStorage.setItem("formList", JSON.stringify(this.formList));
  }
 },
 created() {
  this.formList = JSON.parse(localStorage.getItem("formList"))|| [
   { pics: [] }
  ];;
 }
};
</script>
 
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.view {
 width: 1000px;
 margin: 0 auto;
}
.item {
 width: 100%;
}
</style>